package kr.co.doriclassic.chapter24.student.dao;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

import kr.co.doriclassic.chapter24.student.vo.Student;

public class StudentDao implements InterfaceDao<Student> {
	ArrayList<Student> lists;
	private final String filePath = "studentList.data";
	
	@Override
	public void insertItem(Student item) {
		if(!lists.contains(item))
			lists.add(item);
	}

	@Override
	public void deleteItem(Student item) {
		if(lists.contains(item))
			lists.remove(item);

	}

	@Override
	public void updateItem(Student item) {
		if(lists.contains(item))
			lists.set(lists.indexOf(item), item);
	}

	@Override
	public Student searchItem(Student item) {
		Student searchValue=null;
		if(lists.contains(item))
			searchValue=lists.get(lists.indexOf(item));
		return searchValue;			
	}

	@Override
	public void prnItemList(Comparator<Student> comp) {
		if(comp==null){
			Collections.sort(lists);
		}
		else{
			Collections.sort(lists, comp);
		}
		for (Student std : lists) {
			System.out.println(std);
		}
	}

	@Override
	public void loadFile() {
		ObjectInputStream ois=null; 
		try {
			ois = new ObjectInputStream(new BufferedInputStream(new FileInputStream(filePath)));
			lists = (ArrayList<Student>) ois.readObject();
		} catch (FileNotFoundException e) {
			try {
				new File(filePath).createNewFile();
				lists=new ArrayList<>();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
		}catch(Exception e){}
		finally{
			if(ois!=null)try {ois.close();} catch (IOException e) {}
		}		
	}

	@Override
	public void saveFile() {
		ObjectOutputStream oos = null;
		try {
			oos = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(filePath)));
			oos.writeObject(lists);//저장
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			if(oos!=null){try {oos.close();} catch (IOException e) {}}
		}
	}

}
